<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 内部样式表 -->
     <style>
        button {
            background-color: gold;
            color: silver;
        }
     </style>

     <!-- 外部样式表通过link引入 -->
      <link rel="stylesheet" href="./css/index.css">
</head>
<body>
    <!-- css的优先级：就近原则 -->
    <button style="background-color: blanchedalmond;color:aqua;">我喜欢你</button>
    <button>你喜欢我</button>
    <button>123321</button>
</body>
</html>